<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template v-slot:="scope">
            '
            <el-row
              :class="['bdbottom', i1 === 0 ?'bdtop':'','vcenter']"
              v-for="(item1,i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环  嵌套渲染二级权限-->
                <el-row
                  :class="[i2===0?'':'bdtop','vcenter']"
                  v-for="(item2,i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row,item2.id)"
                    >{{item1.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template v-slot:="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)" size="mini">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed" >
     <!-- 树形控件 -->
     <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all default-expanded-keys="defkeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
        // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible : false,
    //   所有权限的数据
    rightslist:[],
    // 这是树形控件的属性绑定对象
    treeProps:{
        label:'authName',
        children:'children'
    },
    // 默认选中的节点id值数组
    defkeys:[],
    // 当前即将分配权限的角色id
    roleId:''
    }
  },
  created() {
    this.getRolesList();
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.rolelist = res.data;
      console.log(this.rolelist);
    },
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件，是否要继续？",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtomText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除!");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败!");
      }
      role.children = res.data;
    },
    // 战士分配权限的对话框
   async showSetRightDialog(role) {
     this.roleId=role.id
        // 获取所有权限的数据
       const {data:res} = await this.$http.get('rights/tree')
       if(res.meta.status !==200){
           return this.$message.error('获取权限数据失败')
       }

    //    把获取到的权限的数据保存到data中
       this.rightslist = res.data
       console.log(this.rightslist);
      //  递归获取三级节点id
      this.getLeafKeys(role,this.defkeys)
        this.setRightDialogVisible = true
    },
    // 通过递归的形式获取角色的三级权限id，并保存到defkeys中
    getLeafKeys(node,arr){
    // 如果当前node节点不包含children属性，则是三级节点
    if(!node.children){
      return arr.push(node.id)
    }
      node.children.forEach(item=> this.getLeafKeys(item,arr)
      
      );
  },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed(){
      this.defkeys=[]
    },
      // 点击为角色分配权限
   async allotRights(){
      const keys=[
        ...this.$refs.treeRef.
        getCheckedKeys(),
        ...this.$refs.treeRef.
        getHalfCheckedKeys()
      ]
      const idstr = keys.join(',')
      
    const {data:res }   = await this.$http.post(`roles/${this.roleId}/rights`,{rids: idstr})
    if(res.meta.status!==200){
      return this.$message.erroe('分配权限失败！')
    }
    this.$message.success('分配权限成功！')
    this.getRolesList()
    this.setRightDialogVisible = false
    }

 },
    
  // 根据id删除对应的权限
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>